Need advice before i get too excited...

So my husband and I had sex on the 5th and the 8th and both days fell within my fertility days. My period isn't due until Wednesday but I thought I would take one of the early first response test just for fun this morning and I definitely didn't expect the result below.I'm not happy and excited yet because I don't fully believe it! My plan is to take two more this weekend and see what they say. thoughts?